Self-Assembling and Self-Immolative Three-in-One Prodrug Nanoassemblies for Self-Synergistic Combinational Anticancer...

Area of Science:

• Biomedical Engineering
• Cancer Biology
• Drug Delivery Systems

Background:

• Combination therapy enhances anticancer efficacy but faces challenges in targeted codelivery.
• Cancer cells exhibit altered redox states exploitable for therapeutic strategies.

Purpose of the Study:

• To synthesize and evaluate a self-assembling trimeric prodrug (RqGem) for synergistic cancer therapy.
• To investigate the potential of antioxidant depletion-mediated combination therapy.

Main Methods:

• RqGem synthesized by conjugating gemcitabine (GEM) and all-trans retinoic acid (atRA) via a glutathione-depleting quinone methide (QM) linker.
• RqGem self-assembles into nanoassemblies with high drug loading.
• Esterase-triggered self-immolation releases GEM, atRA, and QM for combinatorial action.

Main Results:

• RqGem nanoassemblies demonstrated homogeneous formation and efficient drug loading.
• In vitro and in vivo studies showed synergistic anticancer activity.
• RqGem exhibited superior efficacy in mouse xenograft models compared to a simple drug mixture.

Conclusions:

• RqGem represents a novel self-assembling prodrug strategy for synergistic combination cancer therapy.
• Antioxidant depletion-mediated drug release offers a promising approach for enhancing therapeutic outcomes.
• The rational design of RqGem provides insights for developing advanced drug delivery systems.